从PowerShell 3.0

Question

我试图让PowerShell 3.0从函数返回一个数组。不幸的是，这并没有很好的记录，因为我在过去的两天里一直在谷歌搜索这方面的例子。我很接近用C＃重写整个脚本并将其称为一天。

脚本检查变量中包含的一组URL。有问题的函数从数组中获取URL的列表，并循环遍历数组，将HTTP状态代码添加到新数组。该函数执行上述所有操作，但它不返回数组。这是有问题的功能：

function URLCheck ($URLStatusCode)
{
    foreach($uri in $URLStatusCode )
    {
        $result = @()
        $time = try
        {
            $request = $null
            ## Check response time of requested URI.
            $result1 = Measure-Command { $request = Invoke-WebRequest -Uri $uri}
            $result1.TotalMilliseconds
        }
        catch
        {
            <# If request generates exception such as 401, 404 302 etc,
            pull status code and add to array that will be emailed to users #>
            $request = $_.exception.response
            $time = -1
        }
        $result += [PSCustomObject] @{
            Time = Get-Date;
            Uri = $uri;
            StatusCode = [int] $request.StatusCode; 
            StatusDescription = $request.StatusDescription; 
            ResponseLength = $request.RawContentLength; 
            TimeTaken =  $time;
        }
    }
    return $result
}

我称之为：

URLCheck $LinuxNonProdURLList
$result

我还在执行后打印了$ result的内容，我注意到它是空的。但是，如果我将return语句放在foreach循环中，它会将信息发送到控制台。

非常感谢任何帮助。

Answer 1

经过一些故障排除后，我发现数组$ result只是函数的本地。我在foreach循环之外声明了数组并修复了错误。这是更新的代码：

function URLCheck ($URLStatusCode)
{
    $result = @()
    foreach($uri in $URLStatusCode )
    {
        $time = try
        {
            $request = $null
            ## Check response time of requested URI.
            $result1 = Measure-Command { $request = Invoke-WebRequest -Uri $uri}
            $result1.TotalMilliseconds
        }
        catch
        {
            <# If request generates exception such as 401, 404 302 etc,
            pull status code and add to array that will be emailed to users #>
            $request = $_.exception.response
            $time = -1
        }
        $result += [PSCustomObject] @{
            Time = Get-Date;
            Uri = $uri;
            StatusCode = [int] $request.StatusCode; 
            StatusDescription = $request.StatusDescription; 
            ResponseLength = $request.RawContentLength; 
            TimeTaken =  $time;
        }
    }
    return $result
}